A walking beam pumping unit crank counterweight adjusting device

Abstract

The utility model discloses a walking beam type pumping unit crank balance block adjusting device, including motor, hydraulic pump, three -position four -way electromagnetic valve and hydraulic cylinder, and hydraulic cylinder includes piston rod, piston and cylinder barrel, and the one end fixed mounting of piston rod is close to balance block has the push plate, and the other end of piston rod is fixedly connected with piston. The oil liquid of hydraulic pump output passes three -position four -way electromagnetic valve and flows to hydraulic cylinder. The utility model adopts motor and hydraulic pump as power source when working, and the piston rod horizontal movement of hydraulic cylinder is driven to the high pressure oil output of hydraulic pump, and then the piston rod promotes balance block to move to adjust balance block to the position required to the present technical manpower lever lever. Compared with, the utility model greatly improves the labor productivity and improves the working conditions of workers, and the balance block does not need the labor of workers to adjust, and the balance block adjusts rapidly, and the influence of oil well production caused by adjusting balance is greatly reduced, and has remarkable economic benefits.

Description

Technical Field

[0001] This utility model relates to the field of walking beam pumping unit equipment, and in particular to a crank balance block adjustment device for a walking beam pumping unit. Background Technology

[0002] Currently, the vast majority of oil production equipment used in oilfields is the beam pumping unit. During operation, the pumping unit needs to lift the weight of the sucker rod string and the fluid in the well during the upstroke, requiring the electric motor to perform significant work. During the downstroke, the sucker rod string falls under its own weight, requiring no work from the electric motor and instead performing work on it, putting the motor in a regenerative braking state. Therefore, the load on the electric motor during the upstroke and downstroke is uneven, which can easily damage the motor. To reduce this uneven load, beam pumping units are often crank-balanced. The balance weights installed on the crank of the beam pumping unit store energy during the downstroke and release it during the upstroke, making the load on the electric motor more evenly distributed during the upstroke and downstroke.

[0003] During production, changes in formation conditions and wellbore operating conditions can disrupt the original balanced state of the pumping unit. This necessitates frequent adjustments to the balance weights to maintain the unit's balance. Currently, the commonly used method for adjusting the balance weights of beam pumping units involves workers using a pry bar to move the balance weights little by little to the appropriate position. Since the balance weights weigh several tons, this requires multiple people to operate, is very slow and labor-intensive, results in high worker workload, and leads to prolonged pumping unit downtime, disrupting production and impacting well output. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a crank balance block adjustment device for a walking beam pumping unit.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a crank balance block adjustment device for a beam pumping unit, comprising an electric motor, a hydraulic pump, a three-position four-way solenoid valve, and a hydraulic cylinder. The hydraulic cylinder includes a piston rod, a piston, and a cylinder barrel. A push plate is fixedly installed at one end of the piston rod near the balance block, and the other end of the piston rod is fixedly connected to the piston. The piston is movably connected to the cylinder barrel. The oil inlet of the hydraulic pump is connected to an oil tank, and the oil outlet of the hydraulic pump is connected to the P port of the three-position four-way solenoid valve. The A port of the three-position four-way solenoid valve is connected to the rod chamber of the hydraulic cylinder, the B port of the three-position four-way solenoid valve is connected to the rodless chamber of the hydraulic cylinder, and the T port of the three-position four-way solenoid valve is connected to the oil tank. A support is fixedly connected to the cylinder barrel, and the support is fixed to the crank of the pumping unit with a first bolt and a second bolt. The shaft of the hydraulic pump is connected to the shaft of the electric motor.

[0006] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention uses an electric motor and a hydraulic pump as power sources during operation. The high-pressure oil output from the hydraulic pump drives the piston rod of the hydraulic cylinder to move horizontally, which in turn pushes the balance block to move, thereby adjusting the balance block to the required position. Compared with the manual prying of existing technologies, this invention greatly improves labor productivity and workers' working conditions. Adjusting the balance block requires no manual labor, the adjustment is rapid, the downtime of the pumping unit is greatly shortened, and the impact on oil well production caused by balancing is significantly reduced, resulting in significant economic benefits. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of a crank balance block adjustment device for a beam pumping unit provided in an embodiment of the present invention.

[0008] In the diagram: 1. Electric motor; 2. Hydraulic pump; 3. Three-position four-way solenoid valve; 4. Piston rod; 5. Piston; 6. Cylinder; 7. Balance block; 8. Push plate; 9. Oil tank; 10. Support; 11. First bolt; 12. Second bolt; 13. Pumping unit crank. Detailed Implementation

[0009] The preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0010] See Figure 1 A crank balance block adjustment device for a beam pumping unit includes an electric motor 1, a hydraulic pump 2, a three-position four-way solenoid valve 3, and a hydraulic cylinder. The hydraulic cylinder includes a piston rod 4, a piston 5, and a cylinder barrel 6. A push plate 8 is fixedly installed at one end of the piston rod 4 near the balance block 7, and the other end of the piston rod 4 is fixedly connected to the piston 5. The piston 5 is movably connected to the cylinder barrel 6. The oil inlet of the hydraulic pump 2 is connected to an oil tank 9, and the oil outlet of the hydraulic pump 2 is connected to the P port of the three-position four-way solenoid valve 3. The A port of the three-position four-way solenoid valve 3 is connected to the rod chamber of the hydraulic cylinder, the B port of the three-position four-way solenoid valve 3 is connected to the rodless chamber of the hydraulic cylinder, and the T port of the three-position four-way solenoid valve 3 is connected to the oil tank 9. A support 10 is fixedly connected to the cylinder barrel 6 and is fixed to the crank 13 of the pumping unit with a first bolt 11 and a second bolt 12. The shaft of the hydraulic pump 2 is connected to the shaft of the electric motor 1.

[0011] When it is necessary to adjust the balance block of the pumping unit crank, stop the pumping unit crank 13 in a horizontal position, loosen the fixing bolts between the balance block 7 and the pumping unit crank 13, adjust the direction of movement of the balance block 7 according to the required direction, and install this device. If the balance block 7 is adjusted to the left, install this device on the right side of the balance block 7; if the balance block 7 is adjusted to the right, install this device on the left side of the balance block 7. Fix the support 10 to the pumping unit crank 13 with the first bolt 11 and the second bolt 12, and the device is installed. Start the motor 1, energize the electromagnet 1YA of the three-position four-way solenoid valve 3, and connect the right position of the three-position four-way solenoid valve 3 to the hydraulic circuit. The high-pressure oil output by the hydraulic pump 2 enters the rodless chamber of the hydraulic cylinder, and the rod chamber of the hydraulic cylinder is connected to the oil tank 9. Under the action of the high-pressure oil, the piston 5 drives the piston rod 4 to move horizontally beyond the cylinder 6. The push plate 8, fixedly mounted on the piston rod 4, contacts the balance block 7. The pushing force of the horizontal movement of the piston rod 4 acts on the balance block 7 through the push plate 8, causing the balance block 7 to move and be adjusted to the required position. After the balance block 7 is adjusted to the appropriate position, the electromagnet 1YA of the three-position four-way solenoid valve 3 is de-energized, and the middle position of the three-position four-way solenoid valve 3 is connected to the hydraulic circuit, and the oil output by the hydraulic pump 2 is unloaded and returned to the oil tank 9.

[0012] As can be seen from the above, this utility model uses an electric motor 1 and a hydraulic pump 2 as power sources during operation. The high-pressure oil output by the hydraulic pump 2 drives the piston rod 4 of the hydraulic cylinder to move horizontally, which in turn pushes the balance block 7 to move, thereby adjusting the balance block 7 to the required position. Compared with the manual prying of the prior art, this utility model greatly improves labor productivity and workers' working conditions. Adjusting the balance block does not require workers to exert any labor, the balance block is adjusted quickly, the downtime of the pumping unit is greatly shortened, and the impact on oil well production caused by balancing is greatly reduced, resulting in significant economic benefits.

[0013] After adjustment, tighten and secure the balance block 7. Energize the electromagnet 2YA of the three-position four-way solenoid valve 3. The left position of the three-position four-way solenoid valve 3 is connected to the hydraulic circuit. High-pressure oil output from the hydraulic pump 2 enters the rod chamber of the hydraulic cylinder. The rodless chamber of the hydraulic cylinder is connected to the oil tank 9. Under the action of the high-pressure oil, the piston 5 drives the piston rod 4 to retract into the cylinder 6. Loosen the first bolt 11 and the second bolt 12, and remove the device from the pumping unit crank 13 to prevent it from affecting the balance of the pumping unit during the rotation of the crank 13.

[0014] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A crank balance weight adjustment device for a beam pumping unit, characterized in that, The system includes an electric motor (1), a hydraulic pump (2), a three-position four-way solenoid valve (3), and a hydraulic cylinder. The hydraulic cylinder includes a piston rod (4), a piston (5), and a cylinder barrel (6). A push plate (8) is fixedly installed at one end of the piston rod (4) near the balance block (7), and the other end of the piston rod (4) is fixedly connected to the piston (5). The piston (5) is movably connected to the cylinder barrel (6). The oil inlet of the hydraulic pump (2) is connected to the oil tank (9), and the oil outlet of the hydraulic pump (2) is connected to the three-position four-way solenoid valve (3). The P port of the three-position four-way solenoid valve (3) is connected to the rod chamber of the hydraulic cylinder, the B port of the three-position four-way solenoid valve (3) is connected to the rodless chamber of the hydraulic cylinder, and the T port of the three-position four-way solenoid valve (3) is connected to the oil tank (9); the support (10) is fixedly connected to the cylinder (6), and the support (10) is fixed on the crank (13) of the pumping unit with the first bolt (11) and the second bolt (12); the shaft of the hydraulic pump (2) is connected to the shaft of the motor (1).

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